My house has a stone staircase between the first and second floor, with a thin, round, wrought iron banister. The bottom has a banister on one side and plaster wall on the other. The top has a banister on both sides. Pictures attached. Does anyone have any suggestions on baby gates for this type of set up? A lot of pictures I see for banister installs show thicker wood banisters, so I'm hoping someone here has some insight